After you register, refer insidercow.com to your friend
and both of you will get one month free subscription if your accounts
remain open for more than one month. Simply ask your friends to email
us after they register, from the email addresses
they use in the registration and put your email address in the subject
line*, both of you will have one more month of membership credited to
your accounts.

You get one month free for each friend you refer to insidercow.com
and there is no limit!